Synthesis and characterization of one- to three-dimensional compounds composed of paradodecatungstate-B cluster and transition metals as linkers |
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| Authors: | Chun-Yan Sun Lin-Hua Xie Bo Gao Zhong-Min Su |
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| Institution: | a Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, PR China
b Faculty of Chemistry, Institute of Functional Materials, Northeast Normal University, Changchun 130024, PR China |
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| Abstract: | Three new extended frameworks built from paratungstate and transition metals have been synthesized and characterized. In the compound Na8{Cd (H2O)2}(H2W12O42)]·32H2O (1), two neighboring paratungstate-B ions H2W12O42]10− are linked by Cd(H2O)2]2+ units, leading to the formation of infinite one-dimensional (1D) anion chain {Cd(H2O)2}(H2W12O42)]n8n−. The anion {Co(H2O)3}{Co(H2O)4}(H2W12O42)]n6n− of the compound Na6{Co(H2O)3}{Co(H2O)4}(H2W12O42)]·29H2O (2) shows a layer-like (2D) structure in which paratungstate-B units are linked by CoO6 octahedra, while the anion {Co(H2O)3}3(H2W12O42)]n4n− of the compound (H3O+)3{Na(H2O)4}{Co(H2O)4}3(H2W12O42)]·24.5H2O (3) is a three-dimensional (3D) anionic polymer that consists of paratungstate-B units linked by CoO6 octahedra. Compound 3 can reversibly adsorb and desorb water molecules leading to the color reversibly change from pink to violet. The preliminary magnetic measurement and electrochemical properties of compounds are performed. The crystal structure of unexpected product Na4NiW6O24H6]·13H2O (4) is described here for the rare report of crystal structure information on the Anderson-type polyoxotungstate which has nickel as a heteroatom. |
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| Keywords: | Polyoxometalates Paradodecatungstate Transition metal Extend framework Crystal structure |
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